2 * mono-threads-windows.c: Low-level threading, windows version
5 * Rodrigo Kumpera (kumpera@gmail.com)
10 #include <mono/utils/mono-threads.h>
12 #if defined(USE_WINDOWS_BACKEND)
14 #include <mono/utils/mono-compiler.h>
19 mono_threads_suspend_init (void)
24 interrupt_apc (ULONG_PTR param)
29 mono_threads_suspend_begin_async_suspend (MonoThreadInfo *info, gboolean interrupt_kernel)
31 DWORD id = mono_thread_info_get_tid (info);
35 handle = OpenThread (THREAD_ALL_ACCESS, FALSE, id);
38 result = SuspendThread (handle);
39 THREADS_SUSPEND_DEBUG ("SUSPEND %p -> %d\n", (void*)id, ret);
40 if (result == (DWORD)-1) {
45 /* We're in the middle of a self-suspend, resume and register */
46 if (!mono_threads_transition_finish_async_suspend (info)) {
47 mono_threads_add_to_pending_operation_set (info);
48 result = ResumeThread (handle);
49 g_assert (result == 1);
51 THREADS_SUSPEND_DEBUG ("FAILSAFE RESUME/1 %p -> %d\n", (void*)id, 0);
52 //XXX interrupt_kernel doesn't make sense in this case as the target is not in a syscall
55 info->suspend_can_continue = mono_threads_get_runtime_callbacks ()->thread_state_init_from_handle (&info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX], info);
56 THREADS_SUSPEND_DEBUG ("thread state %p -> %d\n", (void*)id, res);
57 if (info->suspend_can_continue) {
58 //FIXME do we need to QueueUserAPC on this case?
60 QueueUserAPC ((PAPCFUNC)interrupt_apc, handle, (ULONG_PTR)NULL);
62 THREADS_SUSPEND_DEBUG ("FAILSAFE RESUME/2 %p -> %d\n", (void*)info->native_handle, 0);
66 return info->suspend_can_continue;
70 mono_threads_suspend_check_suspend_result (MonoThreadInfo *info)
72 return info->suspend_can_continue;
76 mono_threads_suspend_begin_async_resume (MonoThreadInfo *info)
78 DWORD id = mono_thread_info_get_tid (info);
82 handle = OpenThread (THREAD_ALL_ACCESS, FALSE, id);
85 if (info->async_target) {
90 ctx = info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx;
91 mono_threads_get_runtime_callbacks ()->setup_async_callback (&ctx, info->async_target, info->user_data);
92 info->async_target = info->user_data = NULL;
94 context.ContextFlags = CONTEXT_INTEGER | CONTEXT_CONTROL;
96 if (!GetThreadContext (handle, &context)) {
101 g_assert (context.ContextFlags & CONTEXT_INTEGER);
102 g_assert (context.ContextFlags & CONTEXT_CONTROL);
104 mono_monoctx_to_sigctx (&ctx, &context);
106 context.ContextFlags = CONTEXT_INTEGER | CONTEXT_CONTROL;
107 res = SetThreadContext (handle, &context);
109 CloseHandle (handle);
114 result = ResumeThread (handle);
115 CloseHandle (handle);
117 return result != (DWORD)-1;
122 mono_threads_suspend_register (MonoThreadInfo *info)
127 mono_threads_suspend_free (MonoThreadInfo *info)
133 #if defined (HOST_WIN32)
136 mono_threads_platform_register (MonoThreadInfo *info)
138 HANDLE thread_handle;
140 thread_handle = GetCurrentThread ();
141 g_assert (thread_handle);
143 /* The handle returned by GetCurrentThread () is a pseudo handle, so it can't
144 * be used to refer to the thread from other threads for things like aborting. */
145 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle, THREAD_ALL_ACCESS, TRUE, 0);
147 g_assert (!info->handle);
148 info->handle = thread_handle;
152 mono_threads_platform_create_thread (MonoThreadStart thread_fn, gpointer thread_data, gsize stack_size, MonoNativeThreadId *out_tid)
157 result = CreateThread (NULL, stack_size, (LPTHREAD_START_ROUTINE) thread_fn, thread_data, 0, &thread_id);
161 /* A new handle is open when attaching
162 * the thread, so we don't need this one */
163 CloseHandle (result);
166 *out_tid = thread_id;
173 mono_native_thread_id_get (void)
175 return GetCurrentThreadId ();
179 mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2)
185 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg)
187 return CreateThread (NULL, 0, (func), (arg), 0, (tid)) != NULL;
191 mono_native_thread_join (MonoNativeThreadId tid)
195 if (!(handle = OpenThread (THREAD_ALL_ACCESS, TRUE, tid)))
198 DWORD res = WaitForSingleObject (handle, INFINITE);
200 CloseHandle (handle);
202 return res != WAIT_FAILED;
205 #if HAVE_DECL___READFSDWORD==0
206 static MONO_ALWAYS_INLINE unsigned long long
207 __readfsdword (unsigned long offset)
210 // __asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
211 __asm__ volatile ("movl %%fs:%1,%0"
212 : "=r" (value) ,"=m" ((*(volatile long *) offset)));
218 mono_threads_platform_get_stack_bounds (guint8 **staddr, size_t *stsize)
220 MEMORY_BASIC_INFORMATION meminfo;
223 NT_TIB* tib = (NT_TIB*)NtCurrentTeb();
224 guint8 *stackTop = (guint8*)tib->StackBase;
225 guint8 *stackBottom = (guint8*)tib->StackLimit;
227 /* http://en.wikipedia.org/wiki/Win32_Thread_Information_Block */
228 void* tib = (void*)__readfsdword(0x18);
229 guint8 *stackTop = (guint8*)*(int*)((char*)tib + 4);
230 guint8 *stackBottom = (guint8*)*(int*)((char*)tib + 8);
233 Windows stacks are expanded on demand, one page at time. The TIB reports
234 only the currently allocated amount.
235 VirtualQuery will return the actual limit for the bottom, which is what we want.
237 if (VirtualQuery (&meminfo, &meminfo, sizeof (meminfo)) == sizeof (meminfo))
238 stackBottom = MIN (stackBottom, (guint8*)meminfo.AllocationBase);
240 *staddr = stackBottom;
241 *stsize = stackTop - stackBottom;
246 mono_threads_platform_yield (void)
248 return SwitchToThread ();
252 mono_threads_platform_exit (int exit_code)
254 mono_thread_info_detach ();
255 ExitThread (exit_code);
259 mono_threads_platform_unregister (MonoThreadInfo *info)
261 g_assert (info->handle);
263 CloseHandle (info->handle);
268 mono_threads_get_max_stack_size (void)
275 mono_threads_platform_duplicate_handle (MonoThreadInfo *info)
277 HANDLE thread_handle;
279 g_assert (info->handle);
280 DuplicateHandle (GetCurrentProcess (), info->handle, GetCurrentProcess (), &thread_handle, THREAD_ALL_ACCESS, TRUE, 0);
282 return thread_handle;
286 mono_threads_platform_open_thread_handle (HANDLE handle, MonoNativeThreadId tid)
288 return OpenThread (THREAD_ALL_ACCESS, TRUE, tid);
292 mono_threads_platform_close_thread_handle (HANDLE handle)
294 CloseHandle (handle);
297 #if defined(_MSC_VER)
298 const DWORD MS_VC_EXCEPTION=0x406D1388;
300 typedef struct tagTHREADNAME_INFO
302 DWORD dwType; // Must be 0x1000.
303 LPCSTR szName; // Pointer to name (in user addr space).
304 DWORD dwThreadID; // Thread ID (-1=caller thread).
305 DWORD dwFlags; // Reserved for future use, must be zero.
311 mono_native_thread_set_name (MonoNativeThreadId tid, const char *name)
313 #if defined(_MSC_VER)
314 /* http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx */
315 THREADNAME_INFO info;
316 info.dwType = 0x1000;
318 info.dwThreadID = tid;
322 RaiseException( MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info );
324 __except(EXCEPTION_EXECUTE_HANDLER) {
330 mono_threads_platform_set_exited (gpointer handle)
335 mono_threads_platform_init (void)